Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

C81A5A

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-NEQ · DE HAVILLAND DHC-8-300 Dash 8

Hex
C81A5A
Octal
62015132
Decimal
13,113,946
Country
NZ
Tail
ZK-NEQ
Type
DH8C
Broadcasting now · callsign ANZ509L · 20,000 ft
Flights observed
225
Distinct callsigns
20
Country
NZ
Last broadcast
1h ago

Current position

C81A5A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address C81A5A falls within the block assigned to New Zealand (NZ) by ICAO Annex 10, Volume III. Every aircraft registered in New Zealand receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
ANZ763L Air New Zealand 8 2026-05-27
ANZ305L Air New Zealand 6 2026-05-22
ANZ854L Air New Zealand 5 2026-05-29
ANZ843L Air New Zealand 5 2026-05-29
ANZ837L - 5 2026-05-29
ANZ832L - 5 2026-05-29
ANZ764L Air New Zealand 4 2026-05-27
ANZ336L Air New Zealand 4 2026-05-25
ANZ251L Air New Zealand 4 2026-04-22
ANZ064L Air New Zealand 4 2026-05-29
ANZ885L Air New Zealand 3 2026-05-26
ANZ884L Air New Zealand 3 2026-05-26
ANZ357L Air New Zealand 3 2026-05-27
ANZ334L Air New Zealand 3 2026-05-26
ANZ304L Air New Zealand 3 2026-05-22
ANZ302L Air New Zealand 3 2026-05-22
ANZ289L - 3 2026-04-13
ANZ230L Air New Zealand 3 2026-05-15
ANZ199L - 3 2026-05-21
ANZ190L - 3 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ANZ164L GIS → AKL May 29, 22:40 UTCMay 29, 23:40 UTC1h 0m
2026-05-29 ANZ163L AKL → GIS May 29, 21:00 UTCMay 29, 21:50 UTC50m
2026-05-29 ANZ064L NSN → AKL May 29, 18:30 UTCMay 29, 19:20 UTC50m
2026-05-29 ANZ854L CHC → NSN May 29, 07:10 UTCMay 29, 07:25 UTC15m
2026-05-29 ANZ837L - May 29, 06:00 UTCMay 29, 06:20 UTC20m
2026-05-29 ANZ832L - May 29, 04:35 UTCMay 29, 04:55 UTC20m
2026-05-29 ANZ843L NSN → CHC May 29, 03:15 UTCMay 29, 03:35 UTC20m
2026-05-29 ANZ848L CHC → NSN May 29, 01:15 UTCMay 29, 01:40 UTC25m
2026-05-28 ANZ769L NPL → CHC May 28, 23:50 UTCMay 29, 00:20 UTC30m
2026-05-28 ANZ769L NPL → CHC May 28, 22:50 UTCMay 28, 23:15 UTC25m
2026-05-28 ANZ768L CHC → NPL May 28, 20:25 UTCMay 28, 21:30 UTC1h 5m
2026-05-28 ANZ841L NSN → CHC May 28, 19:00 UTCMay 28, 19:35 UTC35m
2026-05-28 ANZ854L CHC → NSN May 28, 07:35 UTCMay 28, 07:50 UTC15m
2026-05-28 ANZ837L - May 28, 06:20 UTCMay 28, 06:35 UTC15m
2026-05-28 ANZ832L - May 28, 04:55 UTCMay 28, 05:15 UTC20m
2026-05-28 ANZ843L NSN → CHC May 28, 03:20 UTCMay 28, 03:45 UTC25m
2026-05-27 ANZ854L CHC → NSN May 27, 07:10 UTCMay 27, 07:35 UTC25m
2026-05-27 ANZ763L NPL → CHC May 27, 05:59 UTCMay 27, 06:25 UTC25m
2026-05-27 ANZ763L NPL → CHC May 27, 05:04 UTCMay 27, 05:19 UTC15m
2026-05-27 ANZ764L CHC → NPL May 27, 03:14 UTCMay 27, 04:24 UTC1h 10m
2026-05-27 ANZ357L WLG → CHC May 27, 01:34 UTCMay 27, 02:29 UTC55m
2026-05-26 ANZ885L NPE → WLG May 26, 22:59 UTCMay 26, 23:54 UTC55m
2026-05-26 ANZ884L WLG → NPE May 26, 21:20 UTCMay 26, 21:59 UTC40m
2026-05-26 ANZ334L CHC → WLG May 26, 19:40 UTCMay 26, 20:24 UTC45m
2026-05-26 ANZ763L NPL → CHC May 26, 05:54 UTCMay 26, 06:20 UTC25m
2026-05-26 ANZ763L NPL → CHC May 26, 04:54 UTCMay 26, 05:10 UTC15m
2026-05-26 ANZ764L CHC → NPL May 26, 03:05 UTCMay 26, 04:10 UTC1h 5m
2026-05-26 ANZ357L WLG → CHC May 26, 01:24 UTCMay 26, 02:15 UTC50m
2026-05-25 ANZ336L CHC → WLG May 25, 20:30 UTCMay 25, 21:09 UTC40m
2026-05-25 ANZ837L - May 25, 06:15 UTCMay 25, 06:30 UTC15m
2026-05-25 ANZ832L - May 25, 04:40 UTCMay 25, 05:05 UTC25m
2026-05-25 ANZ843L NSN → CHC May 25, 03:05 UTCMay 25, 03:35 UTC30m
2026-05-24 ANZ334L CHC → WLG May 24, 21:30 UTCMay 24, 21:45 UTC15m
2026-05-24 ANZ361L WLG → CHC May 24, 05:25 UTCMay 24, 06:20 UTC55m
2026-05-24 ANZ233L ROT → WLG May 24, 00:00 UTCMay 24, 00:55 UTC55m
2026-05-23 ANZ234L WLG → ROT May 23, 22:15 UTCMay 23, 23:05 UTC50m
2026-05-23 ANZ726L BHE → WLG May 23, 20:50 UTCMay 23, 20:55 UTC5m
2026-05-23 ANZ725L WLG → BHE May 23, 19:45 UTCMay 23, 19:55 UTC10m
2026-05-22 ANZ306L NSN → WLG May 22, 23:05 UTCMay 22, 23:15 UTC10m
2026-05-22 ANZ305L WLG → NSN May 22, 21:40 UTCMay 22, 21:50 UTC10m
2026-05-22 ANZ302L NSN → WLG May 22, 20:00 UTCMay 22, 20:10 UTC10m
2026-05-22 ANZ303L WLG → NSN May 22, 08:15 UTCMay 22, 08:25 UTC10m
2026-05-22 ANZ304L NSN → WLG May 22, 06:20 UTCMay 22, 06:35 UTC15m
2026-05-22 ANZ317L WLG → NSN May 22, 04:50 UTCMay 22, 04:55 UTC5m
2026-05-21 ANZ306L NSN → WLG May 21, 23:00 UTCMay 21, 23:10 UTC10m
2026-05-21 ANZ305L WLG → NSN May 21, 21:35 UTCMay 21, 21:40 UTC5m
2026-05-21 ANZ190L - May 21, 19:10 UTCMay 21, 20:05 UTC55m
2026-05-21 ANZ199L - May 21, 06:20 UTCMay 21, 07:25 UTC1h 5m
2026-05-21 ANZ524L NSN → WLG May 21, 04:40 UTCMay 21, 05:00 UTC20m
2026-05-21 ANZ311L WLG → NSN May 21, 03:10 UTCMay 21, 03:20 UTC10m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the ZK-NEQ page for operator, model, and routing details .

Mode-S C81A5A frequently asked

What is Mode-S code C81A5A?
C81A5A is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-NEQ.
Where is Mode-S C81A5A registered?
Mode-S code C81A5A is allocated to New Zealand (NZ). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C81A5A broadcasting right now?
Yes. Mode-S C81A5A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81A5A, octal 62015132, decimal 13,113,946.
What flights does C81A5A operate?
Mode-S C81A5A has broadcast 20 distinct callsigns, including ANZ763L, ANZ305L, ANZ854L, ANZ843L, ANZ837L.